柔性绝缘套管 第3部分：各类套管规范 第281分册：半导体热缩性聚烯烃套管

[中文适用范围]： IEC 60684-3-281:2025 RLV 包含官方的IEC国际标准及其红线版本。红线版本仅提供英文版，可快速方便地比较官方IEC标准与前一版之间的所有更改。IEC 60684-3-281:2025规定了两种类型的热缩聚烯烃套管，其标称收缩比为3:1，具有半导电特性。这种套管已被证明适用于最高温度达100°C的环境。-A型：薄壁，典型内径最大为195.0 mm；-B型：中壁，典型内径最大为120.0 mm。该套管通常以黑色供应。由于这些类型的套管涵盖了广泛尺寸和壁厚范围，附录A提供了可提供尺寸范围的指导。实际尺寸将由用户与供应商协商确定。符合本规范的材料满足已建立的性能水平。然而，用户在特定应用中选择材料应基于该应用中实现良好性能的实际需求，而不仅仅基于本规范。该套管设计用于中压电缆附件，因此其电气性能将在组装过程中得到验证。相关示例见HD 629和IEC 60502（所有部分）。本版取消并取代2010年发布的首版。本版构成技术修订。与前一版相比，本版包含以下重大技术更改：a）体积电阻率要求改为最大值；b）电阻率的测量方法有所更改。 [外文原描述]： IEC 60684-3-281:2025 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60684-3-281:2025 gives the requirements for two types of heat-shrinkable, polyolefin sleeving, semiconductive, with a nominal shrink ratio of 3:1. This sleeving has been found suitable for use up to temperatures of 100 °C. -Type A: Thin wall - Internal diameter up to 195,0 mm typically -Type B: Medium wall - Internal diameter up to 120,0 mm typically This sleeving is normally supplied in the colour black. Since these types of sleevings cover a significantly large range of sizes and wall thicknesses, Annex A provides guidance on the range of sizes available. The actual size will be agreed between the user and the supplier. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application will be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. This sleeving is designed to be used in MV cable accessories and as such electrical performance will be proven as part of the assembly. Examples of this are described in HD 629 and IEC 60502 (all parts). This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) change in volume resistivity requirement to a maximum; b) change in method to measure resistivity.